Questions

Q:

Which formula represents an amino acid?

A) R-CH3(NH2)-COOH B) R-CH(NH2)-COOH
C) R-CH2(NH2)-COOH D) R-CH3(NH2)-COH
 
Answer & Explanation Answer: B) R-CH(NH2)-COOH

Explanation:

Amino acids are the building blocks of proteins. There are about 21 essential amino acids in the human body like histidine, leucine, lysine... The general formula for amino acid is R-CH(NH2)-COOH.

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Q:

Who deciphered the Brahmi and Kharoshthi scripts?

A) Piyadassi B) Colin Mackenzie
C) Alexander Cunningham D) James Prinsep
 
Answer & Explanation Answer: D) James Prinsep

Explanation:

The inscriptions of Asoka were first deciphered by James Princep in 1837. They are written in Pali language and in some places Prakrit was used. The Brahmi script was employed for writing.In the northwestern India Asokan inscriptions were found in Karoshti script.

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Q:

What is an error in a program called

A) Power fail B) Crash
C) Virus D) Bug
 
Answer & Explanation Answer: D) Bug

Explanation:

In computer technology, a coding error in a computer program is called a bug.

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Q:

Nucleons are

A) protons and neutrons B) neutrons and electros
C) protons and electrons D) protons, neutrons and electrons
 
Answer & Explanation Answer: A) protons and neutrons

Explanation:
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Q:

The atoms of the elements which have same number of neutrons are called

A) Isobars B) Isotopes
C) Isotones D) None
 
Answer & Explanation Answer: C) Isotones

Explanation:
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Q:

Mother Teresa was awarded the Nobel Peace Prize in

A) 1976 B) 1979
C) 1969 D) 1971
 
Answer & Explanation Answer: B) 1979

Explanation:
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Q:

Name the International Bank in which Temasek Holdings Pte, Singapore's government - owned investment arm, has announced to pick up 12 per cent stake.

A) Deutsche Bank B) ABN Amro Bank
C) HSBC Bank D) Standard Chartered Plc
 
Answer & Explanation Answer: D) Standard Chartered Plc

Explanation:
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Q:

When a piece of pure silicon is doped with aluminium, then

A) the conductivity of the doped silicon piece will remain the same B) the doped silicon piece will become n-type
C) the doped silicon piece will become p-type D) the resistivity of the doped silicon piece will increase
 
Answer & Explanation Answer: C) the doped silicon piece will become p-type

Explanation:

p type of semiconductor is obtained when Silicon is doped with a trivalent impurity like Aluminium. Aluminium is a p-type dopant, which means that when a semiconductor i.e. silicon is doped with aluminium, it creates a hole (positively charged carrier) by accepting an electron from the silicon atom. Electrical conductivity of semiconductors increasesand resistivity remains the same

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Filed Under: Physics
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